The paper cited shows the redshift is 7.07 or z=7.07. Using the cosmology calculators, https://ned.ipac.caltech.edu/help/cosmology_calc.html
#1 indicates the light-time distance is near 13 billion light-years, comoving radial distance close to 29 billion light-years distance (where the object is today in BB model). The angular size distance a bit more than 3.5 billion light-years so the diameter of the universe when the object formed was near 7 billion light-years in diameter compared to present size reported at near 93 billon light years in diameter.
Here is another cosmology calculator for checking, https://www.kempner.net/cosmic.php
Using redshift 7.07 and defaults, the look back time distance a bit more than 13 billion light years from Earth, the diameter of the universe when formed a bit larger than 7 billion light years, and present distance or comoving radial distance, close to 29 billion light years distance from Earth. I find these are important parameters or concepts to define to the public when presenting the interpretations from the BB model.
Space.com reported, "The question is, when did galactic winds come into existence in the universe?" Takuma Izumi, a researcher at the National Astronomical Observatory of Japan (NAOJ), said in a statement. "This is an important question, because it is related to an important problem in astronomy: How did galaxies and supermassive black holes co-evolve?"
Do we see galactic winds and SMBH *co-evolve* today for example, nearby the Milky Way? It seems the answer is no, thus the origin process(s) operating in the early universe is very different than the present